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/*
 * Copyright © 2017 camunda services GmbH ([email protected])
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.zeebe.test.util;

import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;

/**
 * Identity function on one of the arguments
 *
 * @author Lindhauer
 */
public class ArgumentAnswer implements Answer
{

    protected int argIndex;

    public ArgumentAnswer(int argIndex)
    {
        this.argIndex = argIndex;
    }

    @Override
    public T answer(InvocationOnMock invocation) throws Throwable
    {
        return (T) invocation.getArguments()[argIndex];
    }
}